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PCE
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Search for IPC and CPC classification codes or keywords
DIFF Subgroup
G02B 5/20

Filters (polarising elements G02B5/30)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Filters

CPC: Filters (polarising elements G02B5/30)

Full Title

Full titles differ between systems:

IPC:

Optical elements other than lenses > Filters

CPC:

Optical elements other than lenses (light guides G02B6/00; optical logic elements G02F3/00) > Filters (polarising elements G02B5/30)

CPC subdivides this area 4x more granularly than IPC with 8 additional codes.

8 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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